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No exploitation reportedFix available

CVE-2019-20633

No exploitation reported by the sources we read.

  • Published2020-03-25
  • WeaknessCWE-415

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk in pch.c that can cause a denial of service via a crafted patch file. NOTE: this issue exists because of an incomplete fix for CVE-2018-6952.

Timeline

dates in UTC
  1. 2020-03-2517:15CVE publishedNVD

Versions per branch

NVD
Gnu patch
BranchAffectedFixed in
2.7≤ 2.7.6no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • patchWolfiall versions · fixed in 2.7.6-r3
  • patchUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • patchUbuntu:25.10all versions · no fixed version listed
  • patchUbuntu:24.04:LTSall versions · no fixed version listed
  • patchUbuntu:22.04:LTSall versions · no fixed version listed
  • patchUbuntu:20.04:LTSall versions · no fixed version listed
  • patchUbuntu:18.04:LTSall versions · no fixed version listed
  • patchUbuntu:16.04:LTSall versions · no fixed version listed

26 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-20633 Red Hat Product Security7 known affected

    patch: double free in another_hunk function in pch.c

    patch.src as a component of Red Hat Enterprise Linux 5 · patch as a component of Red Hat Enterprise Linux 6 · patch.src as a component of Red Hat Enterprise Linux 6 · +4 more

Full record on NVD

Fix

  1. No fix available, says the vendor Red Hat Product Security CVE-2019-20633 · 4 productsFix deferred
  2. No fix planned, says the vendor Red Hat Product Security CVE-2019-20633 · 3 productsOut of support scope

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2020-03-25
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-w88p-xvmw-fxgg

Frequently asked questions

What is CVE-2019-20633?

GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk in pch.c that can cause a denial of service via a crafted patch file. NOTE: this issue exists because of an incomplete fix for CVE-2018-6952.

Is CVE-2019-20633 actively exploited?

Active exploitation of CVE-2019-20633 has not been confirmed. Its EPSS score was 1.0% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-20633?

CVE-2019-20633 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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